/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlinePurchaseInterface.h
virtual [FDelegateHandle](API\Runtime\Core\Delegates\FDelegateHandle) AddOnUnexpectedPurchaseReceiptDelegate_Handle ( const [FOnUnexpectedPurchaseReceiptDelegate](API\Plugins\OnlineSubsystem\Interfaces\FOnUnexpectedPurchaseReceiptDele-) & Delegate )